18
Hot Surface Ignition Models Service Manual
Ignitor Heats Up, Motor Starts and Runs, and Fuel Ignites,
But Heater Shuts Off After a Short Period of Time
Ignition Control Trips out Within the
First Ten Seconds of Operation
Safety Control Trips out After
Ten Seconds of Operation
Photocell Boot Not Properly Seated
in Bracket
Check for proper Pump Pressure
Dirty/Clogged Filters in Compressor
Check for Restricted Fuel Flow
Due to:
A. Seal Leak
B. Filter Blocked
C. Restriction in Nozzle or
Nozzle Adapter
Fuel Cap and Gasket Not Vented
4
5
6
7
8
Defective Ignition Control
Bad Electrical Connection(s) or
Wired Incorrectly
1
2
3
Defective or Dirty Photocell
TEST PROCEDURE
1 Defective Ignition control
Remove pressure gauge plug from filter end cover. Re-
move 4 side cover screws that attach the side cover to
the heater. Allow side cover (with ignition control attached)
to rest on fuel tank flange. Disconnect only the photocell
wires from ignition control. Attach the HA1170 leads to
the photocell terminals on the ignition control. Plug the
power cord into a grounded 120V/60 Hz outlet. When
the motor starts turn the HA1170 toggle switch to the
"flashing" red LED position (see page 10 for HA1170
calibration procedures). If the motor shuts off after 3 or 4
seconds, the control is defective and should be replaced.
If the motor continues to run in step 1, the photocell may
be dirty or defective.
OBSERVED FAULT
Toggle Switch
Flashing
Red LED
Test Leads
Photocell
Ends
For replacement parts contact:
www.PartsFor.com
